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Releases: rohingosling/code-probe-c64

Code Probe 2.1

02 May 10:25
@rohingosling rohingosling
v2.1
8a7edcc

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First public release of the 2026 assembly reconstruction of Code Probe 2.0 (1990). A 4 KiB machine-language monitor for the Commodore 64 that loads at $C000 on a stock machine and is invoked from BASIC with SYS 49152. No cartridge or memory expansion required.

Features

  • 11 commands — A (alter), D (dump), R / RF (registers and flags), F (fill), T (transfer), G (go), S (save), L (load + directory), CLS, EXIT.
  • Hex dump with PETSCII sidebar at 8 bytes per row.
  • Interactive alter mode with cursor navigation and auto-commit at ten bytes per line.
  • Shadow-register dispatch via RTI — user routines return to the monitor through BRK, with live CPU state captured back into the shadow block.
  • Disk I/O at device 8 — PRG and SEQ save / load, directory listing.

Release Assets

  • code-probe-2.1.d64 — distribution disk image. Contains CODEPROBE plus six demos and utilities referenced from the user manual (CLS-ML, CLS-BASIC, HELLO, HELLO-RUN, CUBE-C64, CUBE-VIC20).
  • user-manual.pdf — full user manual with worked tutorials, memory map, error messages, quick-reference card, and a VICE emulation appendix.
  • LICENSE — MIT licence text.

Quick Start

LOAD "CODEPROBE",8,1
SYS 49152

See the README for full command syntax and the bundled user manual for tutorials.

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